One of my volunteer responsibilities at a local military museum is to research artifacts which are donated and to be catalogued. We have two USN flight jackets, a M-444 Light Winter jacket and M-445 Heavy Winter Jacket (both made by Monarch) which I am researching. What I have found on the internet is spotty. Can anyone provide any details on these jackets, such as materials, manufacturers, contract numbers, or interesting details about the jackets (for example I've learned about the abrasion diamonds on the sleeves of both of these jackets.) Also what is the difference between the M-445 and M-445A? I know I'm casting a wide net here but anything would be of help. Thanks!